From patchwork Mon Jan 23 15:12:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 13112353 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5B3D0C38142 for ; Mon, 23 Jan 2023 15:13:52 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7C76D10E4BB; Mon, 23 Jan 2023 15:13:51 +0000 (UTC) Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by gabe.freedesktop.org (Postfix) with ESMTPS id 712A410E4BB for ; Mon, 23 Jan 2023 15:13:42 +0000 (UTC) Received: by mail-pj1-x102d.google.com with SMTP id u1-20020a17090a450100b0022936a63a21so15544738pjg.4 for ; Mon, 23 Jan 2023 07:13:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amarulasolutions.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=cD1qAiqhfd1q1+yXxcnzmuelB54aAtoGJRwcpOhnRjA=; b=Y9rWx+WXq1qAX/ArzBiXIUhyfMnCHXDxcO7ot7UzGnsPIDOdGxmc/Z+COV1bU++iIv 86N2rYuZx4/QE6h+tMDg8esBTYRgVr39odhbGrPc4hg5DYuW8N3zWVAvUYrqioN/umJS afFF811AfM8YTCAwfGgtNJJbN0yhOQukp3WFU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=cD1qAiqhfd1q1+yXxcnzmuelB54aAtoGJRwcpOhnRjA=; b=DbyjxfzfgLg6mphIMtAYKvd+TdCgD8bGYVVshrEhTTq8TezGLR1nwDr2qeZ5a36RWP RuEml83Lu+x9xY0+0fCtr1XHulh+C2GrhqtxqnhgWLExkgMjUvqlpgZSiqVCqTsMuArH JLnoxQM/GSpS+kNBbtojIaSW4v6y1J8HjCi5NY8rjTI1OaBs1TfPmGL95jBgL8CQGtkq pvfiKScLpamiEOaOpOn6I/3Bv160Zo2o7PFnh1NuhtY+UzZ6ccH09lQ352XnBbS6p3qu D+vLTAS7JsGg1XyEKPSyiZOwaC4HSUucGoWjAYDn+FNVIa+is4v3JxASUBtlx51fQipy Fswg== X-Gm-Message-State: AFqh2kp8lkBv9euzciNHI/aKlSRS9SMz5C8DMO/D26p+0YGFDOQ3DFCN NQLkTx6J9mD9NX/Eh7WTAfuOHCIjUj7SG0iZgkA= X-Google-Smtp-Source: AMrXdXsdTQhVM+xle4TpxW5nEZqRgPKRqp/L1BsIVF+zMqosAydzOF8MeKAK+Z/XO13wcKPF8w3Oag== X-Received: by 2002:a17:902:eccf:b0:194:dd88:ea13 with SMTP id a15-20020a170902eccf00b00194dd88ea13mr18887694plh.55.1674486822037; Mon, 23 Jan 2023 07:13:42 -0800 (PST) Received: from localhost.localdomain ([2405:201:c00a:a15f:2279:f361:f93b:7971]) by smtp.gmail.com with ESMTPSA id d5-20020a170903230500b001754fa42065sm19207111plh.143.2023.01.23.07.13.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Jan 2023 07:13:41 -0800 (PST) From: Jagan Teki To: Andrzej Hajda , Inki Dae , Marek Szyprowski , Joonyoung Shim , Seung-Woo Kim , Kyungmin Park , Frieder Schrempf , Fancy Fang , Tim Harvey , Michael Nazzareno Trimarchi , Adam Ford , Neil Armstrong , Robert Foss , Laurent Pinchart , Tommaso Merciai , Marek Vasut Subject: [RESEND PATCH v11 10/18] drm: exynos: dsi: Add input_bus_flags Date: Mon, 23 Jan 2023 20:42:04 +0530 Message-Id: <20230123151212.269082-11-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230123151212.269082-1-jagan@amarulasolutions.com> References: <20230123151212.269082-1-jagan@amarulasolutions.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-samsung-soc@vger.kernel.org, Matteo Lisi , dri-devel@lists.freedesktop.org, NXP Linux Team , linux-amarula , linux-arm-kernel@lists.infradead.org, Jagan Teki Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" LCDIF-DSIM glue logic inverts the HS/VS/DE signals and expecting the i.MX8M Mini/Nano DSI host to add additional Data Enable signal active low (DE_LOW). This makes the valid data transfer on each horizontal line. So, add additional bus flags DE_LOW setting via input_bus_flags for i.MX8M Mini/Nano platforms. Reviewed-by: Frieder Schrempf Suggested-by: Marek Vasut Signed-off-by: Jagan Teki Reviewed-by: Marek Vasut --- Changes for v11: - collect RB from Frieder Changes for v10, v9: - none Changes for v8: - add DE_LOW for i.MX8M Mini/Nano platforms. Changes for v7, v6: - none Changes for v5: - rebased based on updated bridge changes Changes for v4 - v1: - none drivers/gpu/drm/exynos/exynos_drm_dsi.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index d8958838ab7b..5518d92c8455 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -1691,6 +1691,10 @@ static const struct component_ops exynos_dsi_component_ops = { .unbind = exynos_dsi_unbind, }; +static const struct drm_bridge_timings dsim_bridge_timings_de_low = { + .input_bus_flags = DRM_BUS_FLAG_DE_LOW, +}; + static int exynos_dsi_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1777,6 +1781,10 @@ static int exynos_dsi_probe(struct platform_device *pdev) dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; dsi->bridge.pre_enable_prev_first = true; + /* DE_LOW: i.MX8M Mini/Nano LCDIF-DSIM glue logic inverts HS/VS/DE */ + if (dsi->plat_data->hw_type == DSIM_TYPE_IMX8MM) + dsi->bridge.timings = &dsim_bridge_timings_de_low; + ret = component_add(dev, &exynos_dsi_component_ops); if (ret) goto err_disable_runtime;